Function objIs

The objIs() method determines whether two values are the same value.

Two values are the same if one of the following holds:

  • both undefined
  • both null
  • both true or both false
  • both strings of the same length with the same characters in the same order
  • both the same object (meaning both values reference the same object in memory)
  • both numbers and both +0, both -0, both NaN, or both non-zero and both not NaN and both have the same value

This is different from the === operator in that:

  • NaN is equal to NaN
  • +0 is not equal to -0

Since

0.11.9

Example

// Case 1: NaN
objIs(NaN, NaN);                  // true
NaN === NaN;                      // false

// Case 2: Signed zeros
objIs(0, -0);                     // false
objIs(+0, -0);                    // false
objIs(-0, -0);                    // true
0 === -0;                         // true

// Regular comparison
objIs('hello', 'hello');          // true
objIs('hello', 'goodbye');        // false
objIs(1, 1);                      // true
objIs(1, 2);                      // false

// Objects
const obj = { a: 1 };
objIs(obj, obj);                  // true
objIs(obj, { a: 1 });             // false (different objects with same content)
  • objIs(value1, value2): boolean

  • Parameters

    • value1: any

      The first value to compare

    • value2: any

      The second value to compare

    Returns boolean

    True if the values are the same value, false otherwise

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